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Digital Geodata Series
DGS98-6 Sole-Source Aquifers of New Jersey (250 KB)


Sole-source aquifers (SSA) are those aquifers that contribute more than 50% of the drinking water to a specific area and the water would be impossible to replace if the aquifer were contaminated. Sole-source aquifers are defined with guidelines set forth by the U.S. Environmental Protection Agency (EPA) as authorized in section 1424(e) of the Safe Drinking Water act of 1974. Any federally-funded project in an area that could affect ground-water in a sole-source aquifer must be reviewed by the USEPA. This 'project review area' includes the aquifer's 'recharge zone' and it's 'stream-flow source zone'. The recharge zone is the area through which water recharges the aquifer. The source zone is the upstream area that contributes recharge water to the aquifer. Seven sole-source aquifers are defined in New Jersey and their project review areas cover most of the state.

DGS98-6 contains an ARC/INFO Geographic Information System (GIS) polygon coverage of the sole-source aquifers for New Jersey that are approved as of June 1998. The coverage was built by the N.J. Geological Survey from standard GIS files of U.S. Geological Survey (USGS) hydrologic units, New Jersey state and municipal boundaries, and aquifers.

Map Showing the Sole-Source Aquifers of New Jersey.

Map showing sole-source aquifers of NJ

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